Insert and holder for concrete forms



Feb. 23 ,1926. I 1,574,483

J. HlRsHsTx-:IN

INSERT AND HOLDER FR CONCRETE FORMS Filed August '7, 1924 Patented Feb.231, l92f JOSEPH HIRSHSTEIN,

amaai OF CLEVELAND, OHIO.

INSERT .AND HOLDER FOR CONCRETE FOBJ'MS.

Application filed August 7, 1924. Serial No. 730,589.

To all 'whom t may 00a-cern.'

Be it known that l, Josnrrr HnisHsTnIN, a citizen of the United States,residingl at Cleveland, in the county of Cuyahoga and State of Ohio,have invented a certain new and useful improvement in an insert andHolder for Concrete .Forms` of which the following is a full, clear, andexact description, reference being had to the accompanying drawings.

This invention is concerned with the construction of concrete form-s andmore particularly to concrete forms to which it is desired to attachinserts comprising wall -ment with a retaining member` secured orceiling anchors for pipes and the like.

rlhe general object of my invention is to provide an insert adapted tobecome a. permanent part of the concrete structure and which may beattached to the concrete form at the desired position and be maintainedin that position during' the pouring of the concrete and whiclrwill notimpede in any manner the removal of the concrete form from the concrete.

More specifically my invention is directed to the provision of an insertretaining device which may be attached to the form separately of theinsert and to which the insert may be readily attached and be retainedthereby, the retaining device being such. that it will readily disengagefrom the insert when the form is being removed.

Other objects of my invention will hereinafter be set forth in thefollowingv description which refers to the accompanying' drawingsillustrating a preferred form thereof and modi'cations of this preferredform.

Thel essential characteristics are summarized in the claims.

In the drawings I show in cross-section in Figs. 1 and 2, an insertplaced in engageto the form. ln Figs. 3 and L I show in crosssection theinsert illustrated in Figs. 1 and 2, but engaged and maintained inposition by a modified form of the retaining' `means shown in Figs. 1and 2: in Fig. 5 l show in in c.

perspective a preferred form of insert retaining means, the insertillustrated being the saine as the insert shown in Figs. 1 to 4i: Fig',6 shows the insert retaining means illustrated in Fig. 5 as being?7attached to a member of the form, the relation of theV insertbeingoutlined by the dot and dash lines.

li/'iy invention may be embodied ina variety of simple forms and asdisclosed in the present application, it is particularly adapted toretain an insert, such as I have disclosed in my Patent No. L11- 75,342issued to me November 27, 1923. Such an insert comprises a hollowmetallic structure, preferably a casting having a flanged base 10,converging side walls 11 and converging end walls l2 whereby it becomeslocked in the concrete when the latter is once set. Formed interiorly ofthe casting are intermediate ribs 13 properly spaced to support the headof a bolt with the shank thereof extending' through the open side of thein.- sert. Adjacent the open side of the insert, l also providesimilarly formed ribs lll-for engaging the head of a bolt provided witha shorter shank. It will be noted from the drawings that both sets ofribs do not extend the full length of the insert but terminate short ofthe end walls to permit the head of the bolt to be passed into theinsert and over the ribs, the sets of ribs being' formed in staggeredrelation, whereby a bolt may be positioned in any desired locationwithin the confines of the four walls of the insert.

Various expedient methods have been resorted to, to position inserts ofthis and other types upon the concrete form, by the use of nails, forinstance, which were driven into the form in juxtaposition to theroutersurfaces of the walls of the insert; also by providing` apertured lugsor holes in flanges threugh vwhich nails could pass into thev form.These methods have been effective in maintaining the insert in thedesired position while the concrete is being placed in the form, but itfrequently occurs that the concrete chips or cracks when the memberscomprising the insert fastening means are being removed and particularlywhen protruding nail ends are being` severed after the form has beenremoved.

invention contemplates the provision of a simple retaining device whichmay extend into the interior ofthe insert and engage the walls thereofand which may be readily attached to the concrete form separately of anyattaching of the insert to the form. As shown in Figs. 1 and 2, a verysimple form of my invention may comprise a strip of metal having anintermediate looped portion 16 formed to engage the side walls 11 of theinsert, the ends 17 of this strip being perforated whereby the strip maybe nailed to the form and the insert subsequently placed in engagementtherewith. In this form of retaining means the loop portion 16 of courseextends into the insert at the end to which the ribs lll do not extend.

In Figs. 3 and 4 I show the retaining means as comprising Isimply astaple member 20 with the ends 21 thereof kdriven, into the form B. Inthis instance the retaining means is completely covered by the insertwhen the latter is placed in. engagement therewith and the insert mayrest, around the entire perimeter thereof, adjacent the open side, incontact with the form B.

In Figs. 5 and 6, I show a preferred form of my invention whichcomprises a bent metal strip formed to engage the end walls 12 of theinsert and to extend therein a substantial distance whereby the .sideedges ofv the strip may engage the ribs 13 and 1li and exert astabilizing influence upon the insert once the latter is placed inengagement therewith. In this form as in the first form the ends of themetal strip are provided-with perforations 22 and 23 whereby the stripmay be nailed to the form B when not in 'engagement with the insert, asshown in Fig. 6.

I find that the particular shape of the retaining strap Y illustrated inFig. 6 involves only a minimum production cost, serves very well inengagingand maintaining the insert when once positioned thereon. Thisretaining member may be provided with a. sub-loop 24 which affordssuiiicient spring to the end portions 25 to permit manufacturing of thestrip of Va relatively inexpensive steel having low resilient qualities.is shown in Fig. 5, one leg of the member may be wider than the otherwhereby this leg may engage the edges of the side walls 11 of the insertand also engage the under surface of the lugs 13. The other leg andspring loop portion 24 may be of a Width corresponding to the Spacebetween the bolt head retaining ribs whereby the horizontal lsurfaces ofboth sets of ribs may be engaged thereby. The'leg portions, of course,may be formed to engage a considerable surface of the tapering end walls12, the looped portion 24 serving to permit its legs to be drawnslightly toward each other when-the open edge of the insert is beingpassed thereover and thereafter to cause the legs to spring apart andinto firm engagement with the insert end walls.

This particular form of my invention will retain the insert when oncepositioned thereon during any vibration of the form incident to theconstruction of concrete form buildings and is quite effective inpreventing any displacement of the insert when the concrete is beingplaced inthe form.

From the foregoing description of my invention it will be seen thatwhile extremely simple in character from a lmanufacturing view point,its use nevertheless permits an accurate locating of the inserts andalso a ready removal of the forms without necessitating the expenditureof further labor in trimming projecting nail points, etc.

, Furthermore it will be understood that my invention is adaptable tothe retention of inserts of a type other than I herein disclose.

I claim- 1. In combination, a concrete form and resilient means securedto the form and adapted to engage an insert and to maintain it inposition whereby concrete may be placed in the form about the insert andsaid means and the form eventually removed from the said concrete andinsert without marring the concrete.

2. In combination, a concrete form and resilient means adapted to beattached to the form independently of an insert and over which theinsert may be placed whereby the concrete formr may be removed carryingthe insert positioning means with it.

3. In a concrete form the combination of a metallic strip formed toextend into the interior of a hollow insert and snugly enwalls thereof,said strip having the ends thereof adapted to be secured to a member ofthe form, with the intermediate portions contractible whereby the insertmay be slipped over the strip and be retained theret. In combination aconcrete form and resilient means secured to the form and adapted toengage the inner surfaces of the walls of a hollow insert and adapted tomaintain it in position whereby concrete may be placed in the form aboutthe insert and said means and form eventually removed from the said'concret-e and insert without marring the concrete.

5. In combination a concrete form, and a resilient metal strip adaptedto engage a hollow insert and to be secured to the form at a position atwhich it is desired to locate the insert and formed to engage the insertto maintain it in proper position when the concrete is being placed inthe form.

6. In combination a concrete form, and a resilient metallic strip formedto engage a hollow insert and to be attached to the form separately ofthe insert and to engage the walls of they insert whereby it may besubsequently attached.

7. In a concrete form the combination of traotible whereby the strip isunattaohed to a. substantially hollow insert, a metallic strip concreteWhen set in the form and detachl formed to extend into the interior ofthe inably Connected to the insert. sert and snugly engage Wallsthereof7 said ln testimony whereof, I hereunto affix my 5 strip havingthe ends thereof adapted to be signature.

permanently secured to a member of the v form with the intermediateportions oon- JOSEPH HIRSHSTEIN. n

